Malicious PDF — malware analysis report

Static analysis result for SHA-256 0818e0267e5d2427…

MALICIOUS

PDF

44.8 KB Created: 2020-09-03 08:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9050d32b04f45675321ebd732a5fcafc SHA-1: 40ed3ef95f6b31d8f6d4bbfecffc87478a67a954 SHA-256: 0818e0267e5d242767297a41f3c73186291e1cb4e59854df653088a840d79868
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'Nvidia shield tv compatible android games'. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=nvidia+shield+tv+compatible+android+games
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/savivimokefevijavogugejiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/thai_language_for_beginner.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/plus_minus_latex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/agriculture_business_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/82568101276.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/dadozijewidivizanomavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/wefekebep.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/61986967727.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/65170541185.pdf
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/dogavodut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6712/1565/files/acceptance_and_commitment_therapy_treatment_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/jepoxilisadimarenab.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/89254688897.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006faa.bin
7372c63b16dbf45aee48c6976432ceefab67de0b90f39208e967ba91d00f2ca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 5656 bytes
font_01_sfnt_off000082c0.bin
9799ed1a3de0b5e71689106208094741a7916dd9f4f154b42c5a315adb673a5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C0 10364 bytes